[GreatWyrmGold]

Evadam: Before reading, remember that you're the one who wants it realistic.

Originally Posted by Evadam

So she conducted the tests on cricetids, suids and hominids first, and then on voluntary and appropriate test subjects, and instead of amphetamines she developed some kind of safe and melatonin based drug, or something like that?
*The unsuccesful story chances seem pretty interesting though.

That's not the kind of thing you can do solo. About the best she could realistically do is get an internship at a professional research institute and try to smuggle home drugs and/or inject herself with tailored retroviruses or something after hours. Even that is going to have effects which are, at best, a shadow of what you envision.
Of course, you seem to be trying to make a younger, less-insane version of Lab Rat, so it might be easier to just introduce a "spark of genius" into your setting.

Originally Posted by Evadam

Well, I want her to be like an important/main NPC, I am designing the setting based on the real world and trying to make her some kind of modern Leonardo Da Vinci/Hippocrates/Galen.

Originally Posted by Evadam

I just want to be able to point at some hystorical character and say: "See, she is just another (insert Einstein, Nikola Tesla, Shakespeare, Mozzart)..." and I want them to be able to repeat her extraordinary feats if they want.

Someone's drunk on Great Man Theory.
One great genius does not invent an insane invention in a single generation. Great geniuses just slightly accelerate the normal process of iterating on past generations' iterations. Eventually, someone makes an invention at least a little practical, or overcomes a critical but acute obstacle, and gets credited with the whole thing. (That, or someone makes something which looks on paper like something which wouldn't be figured out for decades or centuries, and almost everyone quietly ignores the practical constraints which explain why it was never used.)
Cultural geniuses (e.g, Shakespeare and Mozart) might be closer to this great-man genius innovator type, but only because their chosen fields are so ridiculously fluid.

Originally Posted by Evadam

Well, I thought about starting this campaign in the near future and I wanted some extraordinary characters to point at and say "Hey, that´s the girl who invented Artificial Intelligences... Oh! And there goes the cancer cure inventor and by his side the designer of the cutting-edge spaceships we enjoy today!"

A single person can't plausibly design an operating system or a car themselves (at least, not a good one and not quickly); they simply require too many man-hours in too many fields. One person is never going to be the inventor of AI or the designer of a spaceship. You might find one specific person who used pre-existing technologies to design the first AI which didn't terrify passing children, or one specific person who lead the first starship-design team, but you're not going to find one single person who invented AI or a new spaceship.
Again, not a problem if your setting includes a spark of genius. It's probably not a good idea to introduce such things into a campaign world if they're not going to be relevant...but if the PCs are going to be meeting famous inventors, your campaign is probably one in which super-intelligent people with super-science are very important.